/*
 *  Copyright (C) 2011 JiangHongTiao <jjurco.sk_gmail.com>
 * 
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 * 
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 * 
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package sk.lieskove301.jianghongtiao.liaad.prisoner.gene;

import java.io.Serializable;

/**
 * Date of create: May 15, 2011
 *
 * @author JiangHongTiao <jjurco.sk_gmail.com>
 * @version 2011.0515
 */
public class GeneFunction implements Serializable {
    
    public static double getUniformNumber(GeneEnum gene){
        return Math.abs(Math.tanh(Math.abs(gene.value().randomNumber())));
    }

    /**
     * return true (cooperate) when random number from CDF is greater than 0.5
     * @param gene type of agent's gene - type of function to generate answer
     * @return based on agent's genetic information compute answer. Returns true 
     * when agent will cooperate and random function return number greater or equal
     * than 0.5 and return false or betray if random function will return value 
     * less than 0.5
     */
    public static boolean cooperateByGene(GeneEnum gene){
        return getUniformNumber(gene) >= 0.549306;
    }

}
